Scientific article
Open access

Direct photon cross section with conversions at CDF

ContributorsCDF Collaboration
Publication date2004

We present a measurement of the isolated direct photon cross section in pp¯ collisions at s√=1.8  TeV and |η|<0.9 using data collected between 1994 and 1995 by the Collider Detector at Fermilab (CDF). The measurement is based on events where the photon converts into an electron-positron pair in the material of the inner detector, resulting in a two track event signature. To remove π0→γγ and η→γγ events from the data we use a new background subtraction technique which takes advantage of the tracking information available in a photon conversion event. We find that the shape of the cross section as a function of photon pT is poorly described by next-to-leading-order QCD predictions, but agrees with previous CDF measurements.

Citation (ISO format)
CDF Collaboration. Direct photon cross section with conversions at CDF. In: Physical review. D. Particles, fields, gravitation, and cosmology, 2004, vol. 70, n° 07, p. 074008. doi: 10.1103/PhysRevD.70.074008
Main files (1)
Article (Published version)
ISSN of the journal1550-2368

Technical informations

Creation06/24/2014 11:27:00 AM
First validation06/24/2014 11:27:00 AM
Update time03/14/2023 9:22:54 PM
Status update03/14/2023 9:22:54 PM
Last indexation01/16/2024 11:08:03 AM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack